Headphone



FIG. 1 is a perspective view of a headphone according to our design;

FIG. 2 is a front view of the headphone shown in FIG. 1;

FIG. 3 is a back view of the headphone shown in FIG. 1;

FIG. 4 is a right side view of the headphone shown in FIG. 1;

FIG. 5 is a left side view of the headphone shown in FIG. 1;

FIG. 6 is a top view of the headphone shown in FIG. 1; and,

FIG. 7 is a bottom view of the headphone shown in FIG. 1.

The broken lines depict environment that forms no part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 